GB1378251A - Root-mean-square converter - Google Patents
Root-mean-square converterInfo
- Publication number
- GB1378251A GB1378251A GB136272A GB136272A GB1378251A GB 1378251 A GB1378251 A GB 1378251A GB 136272 A GB136272 A GB 136272A GB 136272 A GB136272 A GB 136272A GB 1378251 A GB1378251 A GB 1378251A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- input
- output
- root
- mean
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06G—ANALOGUE COMPUTERS
- G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
- G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
- G06G7/20—Arrangements for performing computing operations, e.g. operational amplifiers for evaluating powers, roots, polynomes, mean square values, standard deviation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/02—Measuring effective values, i.e. root-mean-square values
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Software Systems (AREA)
- Computer Hardware Design (AREA)
- Measurement Of Current Or Voltage (AREA)
- Networks Using Active Elements (AREA)
Abstract
1378251 Measuring r.m.s. values WESTON INSTRUMENTS Inc 12 Jan 1972 [15 Jan 1971] 1362/72 Heading G1U The r.m.s. value of an input signal I, applied to a'terminal 22, is evaluated by an automatic balancing loop in which the difference I-If, where If is a feedback signal, and the sum I + If, are applied respectively from two summing junctions 28, 30 via amplifiers 18, 20, to the two inputs 21, 23 of a multiplier 12, and the output of the multiplier, which will equal I<SP>2</SP> - If<SP>2</SP>, is integrated 14, to produce the feedback signal If, which signal is also available as an output signal on a terminal 56. In the equilibrium condition, the output of the integrator will be static and therefore the integral of the input then applied to it will be zero. That is, (I<SP>2</SP>-If<SP>2</SP>) dt=0, and therefore, since If is constant, If is the r.m.s. value of the input I. (For Figure see next page)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10674171A | 1971-01-15 | 1971-01-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1378251A true GB1378251A (en) | 1974-12-27 |
Family
ID=22313003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB136272A Expired GB1378251A (en) | 1971-01-15 | 1972-01-12 | Root-mean-square converter |
Country Status (4)
| Country | Link |
|---|---|
| CA (1) | CA953421A (en) |
| DE (1) | DE2165486A1 (en) |
| FR (1) | FR2121692B1 (en) |
| GB (1) | GB1378251A (en) |
-
1971
- 1971-12-30 DE DE19712165486 patent/DE2165486A1/en active Pending
-
1972
- 1972-01-05 CA CA131,763A patent/CA953421A/en not_active Expired
- 1972-01-10 FR FR7200608A patent/FR2121692B1/fr not_active Expired
- 1972-01-12 GB GB136272A patent/GB1378251A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2121692A1 (en) | 1972-08-25 |
| DE2165486A1 (en) | 1972-07-27 |
| FR2121692B1 (en) | 1976-06-11 |
| CA953421A (en) | 1974-08-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |